Electric vacuum-cleaner.



G. T. ROBINSON.

ELECTRIC VACUUM CLEANER.

APPLICATION FILED DEC-29. IQI]. 1,283,565. Patented Nov. 5, 1918.

2 SHEETS-SHEET I.

Elnmmio't G. T. ROBINSON.

ELECTRIC VACUUM CLEANER.

APPLICATION FILED 020.29. 1917.

Patented N 0v. 5, 1918.

2 SHEETS-SHEET 2- @Noua u;

UNITED STATES PATENT onnron.

GEORGE T. ROBINSON, OF BOWLING GREEN, KENTUCKY.

ELECTRIC VACUUM-CLEANER.

Specification of Letters Patent.

Application filed December 29, 1917. Serial No. 209,510.

To all whom it may concern:

Be it known that I, GEORGE T. ROBINSON, a citizen of the United States, residing at Bowling Green, in the county of Varren and State of Kentucky, have invented new and useful Improvements in Electric Vacuum- Cleaners, of which the following is a specification.

T his invention relates to an electric vacuum cleaner, and the object is to provide an improved construction which shall be more efficient than those heretofore employed in attaining the purpose of a device of the character indicated.

Briefly described, the invention comprises a vacuum cleaning device including a nozzle, a tubular member constituting an air duct within which the pressure is reduced'as is customary in devices of this kind the tube being surrounded by a dust bag, and cleaning means of particular construction being provided adjacent to the rear portion of the nozzle. Particular means areemployed for securing the brush or cleaning device in position, and a particular adjusting device is mounted on the nozzle as indicated below.

In the accompanying drawings:

Figure 1 is a view in longitudinal section. Fig. 2 is a section on the line 22 of Fig. 1. Fig. 3 is a top plan view.

Fig. 4 is a perspective view of the brush. The main tube or air duct is designated 10 and the suction or reduced pressure is produced by means of a fan 11 operated by an electric motor 12, the connection for the motor being shown at 14. Suitable handles are provided at 15 and 16, and a dust bag 17 is mounted as shown with reference to the fan and duct 10.

A nozzle 16 extends transversely with reference to the duct 10 and includes a front wall and a rear wall, the latter being cut away as shown at 18 and the edges of the cutaway portions being provided with bearing members 19 for the purpose of mounting a pin or the like 20 carrying-aroller '21. This roller is so mounted as to hold the front wall of the nozzle about one-eighth of an inch from the floor and the rear wall of the nozzle about one-fourth of an inch from the floor when the inclination of the handle with reference to the floor is as shown in Fig. 1. IVhen desired the roller may be removed and the brush may be raised to a slight extent in view of the construction described below.

vNo other adjustment is required in the use of the device, and that above described only when an especially thorough cleaning of a carpet or the like is necessary.

A. brush 25 is mounted in the rear of the nozzle and is secured by means of bolts 26 and 27 passing through apertures 28 and 29 in the base portion of the brush. These bolts or securin devices are provided with heads 30 and at t e opposite ends with hooked por tions 31 adapted to engage grooves 32 formed in the end walls of the nozzles. These grooves extending in approximately vertical direction provide for the vertical adjustment of'the brush. The bristles of the brush are mounted in the manner shown in Fig. 4

extending in diagonal rows, these bristles being shown at 33 and the. diagonally extending spaces between the series of bristles being designated 34:. The mounting of the bristles in the manner indicated results in the formation of a brush which is especially efiective for the purpose to which it is here applied.

A shieldof paper or other suitable material is mounted as shown with reference to the brush and is designated 35, this shield extending to a suitable point with reference to the free ends of the bristles, and may readily be trimmed off to the required extent as the bristles gradually wear away during use. The grooves 32 above mentioned provide for the adjustment of the brush itself, due to the wear of the bristles. It may be added that the paper shield or apron is designed to extend within about one-fourth of an inch of the floor. This apron is provided with offset ends 37 engaged by the hooks 31. The nozzle is tapered or reduced at its lower end, and is outwardly flared at 38. A cutaway portion 39 in the base of the brush provides air duct, a nozzle connected therewith, means for producing reduced pressure within the duct, a brush mounted at the rear of the nozzle and extending longitudinally with reference thereto, and retaining and adjusting devices connecting the brush with the end walls of the nozzle, said walls being provided Patented Nov. 5, 191 8. i

with grooves engaged by the adjusting devices.

2. In a device of the class described. an air duct. a nozzle connected with one end thereotand including end Walls arranged substantially parallelly. means for producing reduced pressure Within the duct and nozzle. a brush extending longitudinally with reference to the main walls of the nozzle. the end Walls of said nozzle being provided with grooves. bolts extending through the bod portion of the brush and engaging said grooves. and means carried by one Wall of the nozzle for spacing said Wall from the floor.

3. In a-device of the class described. a duct, means for producing reduced pressure therein. a nozzle carried by one end of the duct and provided with grooves in the ends thereofm brush mounted on the rear wall of the nozzle. and means carried by the brush and engaging the grooves for adjusting the brush vertically.

In testimony "whereof I aflix in signature.

GEORGE T. RGBIXSON. 

